<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>浮动练习</title>

    <style>
        * {
            margin: 0px;
            padding: 0px;
        }

        .box {
            background-color: #999;
            margin: 100px auto;
            width: 1430px;
            height: 720px;
        }

        .left {
            float: left;
            background-color: pink;
            width: 300px;
            height: 700px;
            margin: 10px 10px;
        }

        .right {
            float: left;
            width: 1100px;
            height: 700px;
            background-color: pink;
            margin-top: 10px;
        }

        .right ul {
            list-style: none;
        }

        .right ul li {
            float: left;
            margin-left: 20px;
        }

        .right ul .leftli {
            margin-left: 0px;
        }

        .right ul .bottomli {
            margin-top: 20px;
        }

        .right ul .leftbottomli {
            margin-left: 0px;
            margin-top: 20px;
        }

        .photodiv {
            background-color: white;
            width: 260px;
            height: 340px;
        }
    </style>

</head>
<body>
    
    <div class="box">
        <div class="left"></div>
        <div class="right">
            <ul>
                <li class="leftli"><div class="photodiv"></div></li>
                <li><div class="photodiv"></div></li>
                <li><div class="photodiv"></div></li>
                <li><div class="photodiv"></div></li>
                <li class="leftbottomli"><div class="photodiv"></div></li>
                <li class="bottomli"><div class="photodiv"></div></li>
                <li class="bottomli"><div class="photodiv"></div></li>
                <li class="bottomli"><div class="photodiv"></div></li>
            </ul>
        </div>
    </div>

</body>
</html>